panic: trap type 4, code=0, pc=ffffffff827202ae
Starting stack trace...
panic(ffffffff8339414c) at panic+0x1ba sys/kern/subr_prf.c:229
kerntrap(ffff80002a773cb0) at kerntrap+0x2fb
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
mtx_enter(deafbeaddeafbf8d) at mtx_enter+0x6e sys/kern/kern_lock.c:545
prsignal(deafbeaddeafb
ead,14) at prsignal+0x36 sys/kern/kern_sig.c:904
reaper(ffff80002a73cf90) at reaper+0x2bc sys/kern/kern_exit.c:516
end trace frame: 0x0, count: 251
End of stack trace.
syncing disks...43 42 1 1 1 set $lines = 0
1 1 1 1 set $maxwidth = 0
1 1 show panic
1 1 trace
1 1 show registers
1 show proc
1 ps
1 1 show all locks
1 show malloc
 giving up

dump to dev 4,1 not possible
rebooting...
SeaBIOS (version 1.8.2-google)
Total RAM Size = 0x0000000080000000 = 2048 MiB
CPUs found: 2     Max CPUs supported: 2
SeaBIOS (version 1.8.2-google)
Machine UUID 9c8ab089-5fb3-144b-a4ba-2e178800b25c
found virtio-scsi at 0:3
virtio-scsi vendor='Google' product='PersistentDisk' rev='1' type=0 removable=0
virtio-scsi blksize=512 sectors=4194304 = 2048 MiB
drive 0x000f26e0: PCHS=0/0/0 translation=lba LCHS=520/128/63 s=4194304
Sending Seabios boot VM event.
Booting from Hard Disk 0...
>> OpenBSD/amd64 BOOT 3.67
boot> machine ddbcpu 0
machine: syntax error
boot> trace
|/-\|/-\|/booting hd0a:trace: -\|/open hd0a:trace: No such file or directory
 failed(2). will try /bsd
boot> machine ddbcpu 1
machine: syntax error
boot> trace